This calculator outputs the how fast the Chevrolet Corvette ZR1 can go in each gear as calculated by the gear ratios, engine redline and tire size.
The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car.

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Tire Size(345/30/20)

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OR

Tire Diameter(inches)

Final Drive Ratio

Redline (RPM)

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

500

5.05

7.18

9.56

11.57

14.11

17.01

0

0

600

6.06

8.62

11.47

13.88

16.93

20.41

0

0

700

7.07

10.06

13.38

16.19

19.75

23.81

0

0

800

8.08

11.5

15.3

18.51

22.57

27.22

0

0

900

9.09

12.93

17.21

20.82

25.39

30.62

0

0

1000

10.1

14.37

19.12

23.13

28.21

34.02

0

0

1100

11.11

15.81

21.03

25.45

31.03

37.42

0

0

1200

12.12

17.24

22.94

27.76

33.85

40.82

0

0

1300

13.13

18.68

24.85

30.07

36.68

44.23

0

0

1400

14.14

20.12

26.77

32.39

39.5

47.63

0

0

1500

15.15

21.55

28.68

34.7

42.32

51.03

0

0

1600

16.16

22.99

30.59

37.01

45.14

54.43

0

0

1700

17.17

24.43

32.5

39.33

47.96

57.84

0

0

1800

18.18

25.86

34.41

41.64

50.78

61.24

0

0

1900

19.19

27.3

36.33

43.95

53.6

64.64

0

0

2000

20.2

28.74

38.24

46.27

56.42

68.04

0

0

2100

21.21

30.17

40.15

48.58

59.25

71.44

0

0

2200

22.22

31.61

42.06

50.89

62.07

74.85

0

0

2300

23.24

33.05

43.97

53.21

64.89

78.25

0

0

2400

24.25

34.49

45.89

55.52

67.71

81.65

0

0

2500

25.26

35.92

47.8

57.84

70.53

85.05

0

0

2600

26.27

37.36

49.71

60.15

73.35

88.45

0

0

2700

27.28

38.8

51.62

62.46

76.17

91.86

0

0

2800

28.29

40.23

53.53

64.78

78.99

95.26

0

0

2900

29.3

41.67

55.45

67.09

81.82

98.66

0

0

3000

30.31

43.11

57.36

69.4

84.64

102.06

0

0

3100

31.32

44.54

59.27

71.72

87.46

105.46

0

0

3200

32.33

45.98

61.18

74.03

90.28

108.87

0

0

3300

33.34

47.42

63.09

76.34

93.1

112.27

0

0

3400

34.35

48.85

65

78.66

95.92

115.67

0

0

3500

35.36

50.29

66.92

80.97

98.74

119.07

0

0

3600

36.37

51.73

68.83

83.28

101.56

122.47

0

0

3700

37.38

53.17

70.74

85.6

104.39

125.88

0

0

3800

38.39

54.6

72.65

87.91

107.21

129.28

0

0

3900

39.4

56.04

74.56

90.22

110.03

132.68

0

0

4000

40.41

57.48

76.48

92.54

112.85

136.08

0

0

4100

41.42

58.91

78.39

94.85

115.67

139.48

0

0

4200

42.43

60.35

80.3

97.16

118.49

142.89

0

0

4300

43.44

61.79

82.21

99.48

121.31

146.29

0

0

4400

44.45

63.22

84.12

101.79

124.13

149.69

0

0

4500

45.46

64.66

86.04

104.1

126.96

153.09

0

0

4600

46.47

66.1

87.95

106.42

129.78

156.49

0

0

4700

47.48

67.53

89.86

108.73

132.6

159.9

0

0

4800

48.49

68.97

91.77

111.04

135.42

163.3

0

0

4900

49.5

70.41

93.68

113.36

138.24

166.7

0

0

5000

50.51

71.84

95.6

115.67

141.06

170.1

0

0

5100

51.52

73.28

97.51

117.98

143.88

173.51

0

0

5200

52.53

74.72

99.42

120.3

146.7

176.91

0

0

5300

53.54

76.16

101.33

122.61

149.52

180.31

0

0

5400

54.55

77.59

103.24

124.92

152.35

183.71

0

0

5500

55.56

79.03

105.15

127.24

155.17

187.11

0

0

5600

56.57

80.47

107.07

129.55

157.99

190.52

0

0

5700

57.58

81.9

108.98

131.86

160.81

193.92

0

0

5800

58.59

83.34

110.89

134.18

163.63

197.32

0

0

5900

59.6

84.78

112.8

136.49

166.45

200.72

0

0

6000

60.61

86.21

114.71

138.8

169.27

204.12

0

0

6100

61.62

87.65

116.63

141.12

172.09

207.53

0

0

6200

62.63

89.09

118.54

143.43

174.92

210.93

0

0

6300

63.64

90.52

120.45

145.74

177.74

214.33

0

0

6400

64.65

91.96

122.36

148.06

180.56

217.73

0

0

6500

65.66

93.4

124.27

150.37

183.38

221.13

0

0

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

Some additional information on how these are calculated:

When D is the diameter of the tire, the car moves forward a distance πD with each revolution of the tire. If there are F revolutions per unit of time, it moves forward at a speed of πD´F per unit of time. If D is in inches and F is in revolutions per minute (rpm), the above result will be in inches per minute. There are 63,360 inches in a mile and 60 minutes in an hour, so one inch per minute equals 60/63360 miles per hour or 1/1056 mph. So we have the following formula:

V(mph) = D(in) ´ F(rpm) ´ (π/1056)

In the automotive industry, the coefficient 1056/π is usually taken to be equal to 336 (exactly it is 336.1352398...) and the formula corresponding to the above is:

(mph)(gear ratio)(336) = (tire diameter in inches)(rpm)

With the above numerical approximation, both formulas are identical if we consider that (rpm)/(gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire. This ratio is normally more than 1, except in overdrive gear. So, calling R the "gear ratio", your final answer is:

V(mph) = D(in) ´ F(rpm) ´ (π/1056) / R

or, approximately: V = (D ´ F) / (336 ´ R)

where V is the velocity (in mph), D the tire diameter (in inches), F the engine rpm, and R the gear ratio.